ever. ...and so does our cleaning crew. [ male announcer ] at citibank, we believe small business is a big deal. what's your story? citibank can help you write it. >>> an embarrassing and potentially dangerous story has the tsa doing damage control. an agent allowed a man to board a flight with an outdated boarding pass and invalid i.d. a nigerian man is in custody tonight charged with being a stowaway. we bring in beverly white from our l.a. station who joins us from lax. beverly, with all the security checkpoints we go through to board a flight, how could this man slip right through? >> reporter: it makes you wonder, raj. it was a tsa document checker and the virgin american gate crew at kennedy new york airport who failed to intercept this accused stowaway. tonight, we're learning it was a crew from delta here at lax and the fbi who waylaid this frequent flyer. travelers say they've learned to live with extra steps before boarding. >> it's not up to par at all, but it's acceptable for now. >> reporter: now a troubling breakdown in security after a u.s. citizen of nigerian descent flew f